John otis phillips



(No Model.)

JL 0. PHILLIPS. BLEGTB IG LAMP SOCKET.

No. 439,304. 7 Patented Oct. 28, 1890 PATENT OFFIC JOHN OTIS PHILLIPS,

OF NEW YORK, N. Y.

ELECTRIC-LAMP SOCKET.

SPECIFICATION forming part of Letters Patent No. 439,304, dated October28, 1890. Application filed February 5, 1890. Serial No. 339,246. (Nomodel.)

To all whom it may concern:

Be it known that I, JOHN OTIS PHILLIPS, of the city and county of NewYork, in the State of New York, have invented a certain new and usefulImprovement in Electric-Lamp Sockets, of which the following is aspecification.

My improvement relates to electric-lamp sockets, so called, and moreparticularly to that class of such sockets called pendent sockets.

I will describe in detail my improvement, and then point out the novelfeatures in claims.

In the accompanying drawings, Figure 1 is a side elevation of alamp-socket embodying my improvement, showing a lamp secured thereto.Fig. 2 is an end view of a lamp detached. Fig. 3 is an end View of themain or body portion of the socket at that end thereof to which the lampis attached. Fig. 4 is a similar View, but showing a certain switch in adifierent position from that shown in Fig. 3. Fig. 5 is an end View of acertain head employed on the socket, which head receives themain-circuit wires. Fig. 6 is a similar view showing the parts in asomewhat difierent position from that shown in Fig. 5. Fig. 7 is avertical section of the main or body portion of the socket, the saidhead being removed. Fig. Sis aview showing a modification. Fig. 9 is alongitudinal central section through the socket, showing the severalparts in assembled adjustment.

Similar letters of reference designate cor responding parts in all thefigures.

A designates an electric-lamp globe, which may be of the usual or anydesired construction.

a designates the filament thereof. The lampsocket is secured in a headA, here shown as a metallic ring. It is thus secured by plasterof-parisor other suitable means. Circuitwires extend from the. filament throughsaid head and connect near their outer ends with contact-pieces a, whichare secured upon the outer ends of the head. Extending from the sides ofthe head and, as shown, opposite each other are pins or projections aO'designates the main or body portion of the lamp-socket. As shown inthe example of my improvement illustrated in Figs. 1, 3,

4, and 7, said main or body portion is cylindrical. It may be made ofany suitable nonconducting material. Extending lengthwise through it andabout centrally is a passage 0. Secured upon said head near one end is ametallic ring 0, which metallic ring extends for a considerable distancebeyond the end of the main or body portion 0, so that an internal socketc is formed inside said ring and outside of the main or body portion 0,and when the point where the said ring 0 is secured to the main or bodyportion C the ring is provided with a circumferentially-extending rib 0.Arranged upon the exterior of the ring 0' and surrounding the same is aring 0 provided near its inner edge with a rib 0 which extends over andembraces the rib c of the ring 0. The ring 0 is thus retained upon thering 0'; but it may rotate about the same.

In Fig. 1 I have shown more clearly that the ring 0 is provided with aslot 0 upon its inner edge, into which slot extends a pin c from thering'c'fl'v This pin and slot operate as stops to limit the degree ofrotation which may be imparted to the ring 0 The ring 0 is provided withbayonet-slots 0 opening upon the outer edge of said ring, and which are,as shown,opposite each other. 'In the ring 0 are formed slots 0 whichare straight and open at their outer ends upon the edge of the ring 0'.When the globe A is to be secured to the lamp-socket, the head A thereofis passed into the socket 0 the pins or projections a thereon passinginwardly through the slots 0 in the ring 0, and also throughlongitudinally-extending portions of the slots 0 in the ring 0 Of coursethe ring 0 has been previously rotated into such a position as to admitof this. When the pins or projections have reached the bottoms of theslots 0 the rings 0 are rotated so as to form bayonet-locks between thehead of the lampglobe and the lamp-socket, as shown more clearly inFig. 1. Upon the other end of the lamp-socket is secured a head D. Thishead is made of any suitable non-conducting material, and is providedcentrally with an aperture through which may extend main-circuit wirescl in the ordinary manner. The inner end of said head, or that shownmore clearly in Figs. 5 and 6, is provided with binding tutecircuit-closers. The circuit-wires d are secured by said binding-screws.Upon the head D is secured a metallic ring D, and surrounding themetallic ring D is another metallic ring D The metallic ring D isprovided with a rib near one of its edges and the metallic ring D with acorresponding rib 61 which embraces the rib on the ring D. The

ring D may thus rotate upon the ring'D, but is secured thereon. A stopsimilar to that previously described is provided to prevent a tooextended rotary movement being imparted to the ring D Upon the main orbody portion 0 of the lamp-socket and extending from the sides thereofand opposite each other, as shown, are pins or projections (1*.

Upon the end of the main or body portion 0, to which the lamp A issecured, are two contact-pieces e e and upon the end of said main orbody portion, to which the head D is secured, are two othercontact-pieces f f The contact-piece e is electrically connected to thecontact-piece f by awiref extending through the main or body portion 0.The contactpiece e is provided with a tongue-shaped circuit-closerfwhich extends into the passage 0 and, as shown, nearly through one endof the main or body portion 0 to the other. This circuit-closer isresilient, and is adapted to be forced against the contact-piece f, inorder to close circuit on the lamp. I have shown a switch for closingsaid circuit, which comprises a shaft G, which is journaled in the mainor body portion 0, and is provided upon the exterior of the main or bodyportion with a hand-piece g, by which the shaft may be rotated. Upon theshaft is a metallic rectangularly-shaped block H, which is rigidlysecured upon said shaft and rotates with it. Such block is oblong. Whenthe shaft is so rotated that one of its long sides is next thecircuit-closer f the circuit-closer is allowed to spring away from thecontact-piece f, in order to break circuit; but when one of the ends ofthe block H is brought into contact with the circuit-closer fiit forcessaid circuit-closer into contact with the contactpiece f to closecircuit. It willbe observed that the hand-piece 9 may be moved in eitherdirection, either to close or open circuit, as

desired, and that, owing to flat surfaces upon the block H being alwayspresented to the circuit-closer, accidental rotation of the shaft isprevented.

In Fig. 8 I have shown a modification of the means for securing the lampto the socket. Such a modification consists, merely, in an inversion, bywhich, instead of the head A of the lamp extending into a socket formedby the ring 0 upon the main or body portion 0, the rings 0 and 0 wouldbe arranged upon the lamp-head A, and would receive the end of the mainor body portion 0 within them in manner similar to the means forsecuring the head D upon the main or bodyportion C. In such case ofcourse the pins a would be upon the main or body portion, and the slots0 0 would be upon the lamp-head A.

What I claim as my invention, and desire to secure by Letters Patent, isx 1. The combination, with two separable parts of an electric-lampsocket, of a lock comprising a stationary'ring secured to one of theseparable parts and provided with a slot, a movable ring provided withan angular slot, a pin secured to the other of the separable parts andadapted to enter both the slots in the said rings, whereby the separableparts may be locked without rotation relatively to each other,substantially as set forth.

2. The combination, with two separable parts of an electric-lamp socket,of a lock comprising a stationary ring having a vertical slot and a pin,the said stationary ring and pin being secured to one of the separableparts, a movable ing provided with a horizontal slot to receive said pinand with an angular slot, and a pin on the other of the two separableparts adapted to enter both said vertical and angular slot-s, wherebythe separable parts may be locked without rotating the one relatively tothe other and the movable ring limited in its movement, substantially asset forth.

JOHN OTIS PHILLIPS.

